Year	Percent
1950	29.02586
1955	28.14526
1960	27.32568
1965	26.38352
1970	25.27651
1975	25.26449
1980	27.29573
1985	27.91457
1990	27.63305
1995	24.12675
2000	22.89893
2005	25.67578
2010	27.63774
2015	28.56399
2020	28.36256
2025	27.96469
2030	28.39333
2035	29.32849
2040	30.58058
2045	31.40136
2050	31.38858
2055	31.11592
2060	30.97082
2065	31.05923
2070	31.20402
2075	31.15396
2080	30.85009
2085	30.46383
2090	30.16604
2095	29.97036
2100	29.77793